138128815603 has 8 divisors (see below), whose sum is σ = 143104219200. Its totient is φ = 133167568128.

The previous prime is 138128815553. The next prime is 138128815607. The reversal of 138128815603 is 306518821831.

138128815603 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138128815603 - 2²¹ = 138126718451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138128815607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3519163 + ... + 3558196.

It is an arithmetic number, because the mean of its divisors is an integer number (17888027400).

Almost surely, 2^138128815603 is an apocalyptic number.

138128815603 is a deficient number, since it is larger than the sum of its proper divisors (4975403597).

138128815603 is an equidigital number, since it uses as much as digits as its factorization.

138128815603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7078061.

The product of its (nonzero) digits is 276480, while the sum is 46.

The spelling of 138128815603 in words is "one hundred thirty-eight billion, one hundred twenty-eight million, eight hundred fifteen thousand, six hundred three".